| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| #include <net/if.h> |
| |
| #include "alloc-util.h" |
| #include "conf-parser.h" |
| #include "extract-word.h" |
| #include "geneve.h" |
| #include "netlink-util.h" |
| #include "networkd-manager.h" |
| #include "parse-util.h" |
| #include "string-table.h" |
| #include "string-util.h" |
| #include "strv.h" |
| |
| #define GENEVE_FLOW_LABEL_MAX_MASK 0xFFFFFU |
| #define DEFAULT_GENEVE_DESTINATION_PORT 6081 |
| |
| static const char* const geneve_df_table[_NETDEV_GENEVE_DF_MAX] = { |
| [NETDEV_GENEVE_DF_NO] = "no", |
| [NETDEV_GENEVE_DF_YES] = "yes", |
| [NETDEV_GENEVE_DF_INHERIT] = "inherit", |
| }; |
| |
| DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(geneve_df, GeneveDF, NETDEV_GENEVE_DF_YES); |
| DEFINE_CONFIG_PARSE_ENUM(config_parse_geneve_df, geneve_df, GeneveDF, "Failed to parse Geneve IPDoNotFragment= setting"); |
| |
| /* callback for geneve netdev's created without a backing Link */ |
| static int geneve_netdev_create_handler(sd_netlink *rtnl, sd_netlink_message *m, NetDev *netdev) { |
| int r; |
| |
| assert(netdev); |
| assert(netdev->state != _NETDEV_STATE_INVALID); |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r == -EEXIST) |
| log_netdev_info(netdev, "Geneve netdev exists, using existing without changing its parameters"); |
| else if (r < 0) { |
| log_netdev_warning_errno(netdev, r, "Geneve netdev could not be created: %m"); |
| netdev_drop(netdev); |
| |
| return 1; |
| } |
| |
| log_netdev_debug(netdev, "Geneve created"); |
| |
| return 1; |
| } |
| |
| static int netdev_geneve_create(NetDev *netdev) { |
| _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; |
| Geneve *v; |
| int r; |
| |
| assert(netdev); |
| |
| v = GENEVE(netdev); |
| |
| r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, r, "Could not allocate RTM_NEWLINK message: %m"); |
| |
| r = sd_netlink_message_append_string(m, IFLA_IFNAME, netdev->ifname); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, r, "Could not append IFLA_IFNAME, attribute: %m"); |
| |
| if (netdev->mac) { |
| r = sd_netlink_message_append_ether_addr(m, IFLA_ADDRESS, netdev->mac); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, r, "Could not append IFLA_ADDRESS attribute: %m"); |
| } |
| |
| if (netdev->mtu != 0) { |
| r = sd_netlink_message_append_u32(m, IFLA_MTU, netdev->mtu); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, r, "Could not append IFLA_MTU attribute: %m"); |
| } |
| |
| r = sd_netlink_message_open_container(m, IFLA_LINKINFO); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m"); |
| |
| r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, netdev_kind_to_string(netdev->kind)); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m"); |
| |
| if (v->id <= GENEVE_VID_MAX) { |
| r = sd_netlink_message_append_u32(m, IFLA_GENEVE_ID, v->id); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, r, "Could not append IFLA_GENEVE_ID attribute: %m"); |
| } |
| |
| if (in_addr_is_set(v->remote_family, &v->remote)) { |
| if (v->remote_family == AF_INET) |
| r = sd_netlink_message_append_in_addr(m, IFLA_GENEVE_REMOTE, &v->remote.in); |
| else |
| r = sd_netlink_message_append_in6_addr(m, IFLA_GENEVE_REMOTE6, &v->remote.in6); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, r, "Could not append IFLA_GENEVE_REMOTE/IFLA_GENEVE_REMOTE6 attribute: %m"); |
| } |
| |
| if (v->inherit) { |
| r = sd_netlink_message_append_u8(m, IFLA_GENEVE_TTL_INHERIT, 1); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, r, "Could not append IFLA_GENEVE_TTL_INHERIT attribute: %m"); |
| } else { |
| r = sd_netlink_message_append_u8(m, IFLA_GENEVE_TTL, v->ttl); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, r, "Could not append IFLA_GENEVE_TTL attribute: %m"); |
| } |
| |
| r = sd_netlink_message_append_u8(m, IFLA_GENEVE_TOS, v->tos); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, r, "Could not append IFLA_GENEVE_TOS attribute: %m"); |
| |
| r = sd_netlink_message_append_u8(m, IFLA_GENEVE_UDP_CSUM, v->udpcsum); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, r, "Could not append IFLA_GENEVE_UDP_CSUM attribute: %m"); |
| |
| r = sd_netlink_message_append_u8(m, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, v->udp6zerocsumtx); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, r, "Could not append IFLA_GENEVE_UDP_ZERO_CSUM6_TX attribute: %m"); |
| |
| r = sd_netlink_message_append_u8(m, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, v->udp6zerocsumrx); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, r, "Could not append IFLA_GENEVE_UDP_ZERO_CSUM6_RX attribute: %m"); |
| |
| if (v->dest_port != DEFAULT_GENEVE_DESTINATION_PORT) { |
| r = sd_netlink_message_append_u16(m, IFLA_GENEVE_PORT, htobe16(v->dest_port)); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, r, "Could not append IFLA_GENEVE_PORT attribute: %m"); |
| } |
| |
| if (v->flow_label > 0) { |
| r = sd_netlink_message_append_u32(m, IFLA_GENEVE_LABEL, htobe32(v->flow_label)); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, r, "Could not append IFLA_GENEVE_LABEL attribute: %m"); |
| } |
| |
| if (v->geneve_df != _NETDEV_GENEVE_DF_INVALID) { |
| r = sd_netlink_message_append_u8(m, IFLA_GENEVE_DF, v->geneve_df); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, r, "Could not append IFLA_GENEVE_DF attribute: %m"); |
| } |
| |
| r = sd_netlink_message_close_container(m); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m"); |
| |
| r = sd_netlink_message_close_container(m); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m"); |
| |
| r = netlink_call_async(netdev->manager->rtnl, NULL, m, geneve_netdev_create_handler, |
| netdev_destroy_callback, netdev); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m"); |
| |
| netdev_ref(netdev); |
| netdev->state = NETDEV_STATE_CREATING; |
| |
| log_netdev_debug(netdev, "Creating"); |
| |
| return r; |
| } |
| |
| int config_parse_geneve_vni(const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| Geneve *v = userdata; |
| uint32_t f; |
| int r; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| r = safe_atou32(rvalue, &f); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse Geneve VNI '%s'.", rvalue); |
| return 0; |
| } |
| |
| if (f > GENEVE_VID_MAX){ |
| log_syntax(unit, LOG_WARNING, filename, line, 0, "Geneve VNI out is of range '%s'.", rvalue); |
| return 0; |
| } |
| |
| v->id = f; |
| |
| return 0; |
| } |
| |
| int config_parse_geneve_address(const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| Geneve *v = userdata; |
| union in_addr_union *addr = data, buffer; |
| int r, f; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| r = in_addr_from_string_auto(rvalue, &f, &buffer); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, "geneve '%s' address is invalid, ignoring assignment: %s", lvalue, rvalue); |
| return 0; |
| } |
| |
| r = in_addr_is_multicast(f, &buffer); |
| if (r > 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, 0, "geneve invalid multicast '%s' address, ignoring assignment: %s", lvalue, rvalue); |
| return 0; |
| } |
| |
| v->remote_family = f; |
| *addr = buffer; |
| |
| return 0; |
| } |
| |
| int config_parse_geneve_flow_label(const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| Geneve *v = userdata; |
| uint32_t f; |
| int r; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| r = safe_atou32(rvalue, &f); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse Geneve flow label '%s'.", rvalue); |
| return 0; |
| } |
| |
| if (f & ~GENEVE_FLOW_LABEL_MAX_MASK) { |
| log_syntax(unit, LOG_WARNING, filename, line, 0, |
| "Geneve flow label '%s' not valid. Flow label range should be [0-1048575].", rvalue); |
| return 0; |
| } |
| |
| v->flow_label = f; |
| |
| return 0; |
| } |
| |
| int config_parse_geneve_ttl(const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| Geneve *v = userdata; |
| unsigned f; |
| int r; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| if (streq(rvalue, "inherit")) |
| v->inherit = true; |
| else { |
| r = safe_atou(rvalue, &f); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Failed to parse Geneve TTL '%s', ignoring assignment: %m", rvalue); |
| return 0; |
| } |
| |
| if (f > 255) { |
| log_syntax(unit, LOG_WARNING, filename, line, 0, |
| "Invalid Geneve TTL '%s'. TTL must be <= 255. Ignoring assignment.", rvalue); |
| return 0; |
| } |
| |
| v->ttl = f; |
| } |
| |
| return 0; |
| } |
| |
| static int netdev_geneve_verify(NetDev *netdev, const char *filename) { |
| Geneve *v = GENEVE(netdev); |
| |
| assert(netdev); |
| assert(v); |
| assert(filename); |
| |
| if (v->id > GENEVE_VID_MAX) |
| return log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL), |
| "%s: Geneve without valid VNI (or Virtual Network Identifier) configured. Ignoring.", |
| filename); |
| |
| return 0; |
| } |
| |
| static void geneve_init(NetDev *netdev) { |
| Geneve *v; |
| |
| assert(netdev); |
| |
| v = GENEVE(netdev); |
| |
| assert(v); |
| |
| v->id = GENEVE_VID_MAX + 1; |
| v->geneve_df = _NETDEV_GENEVE_DF_INVALID; |
| v->dest_port = DEFAULT_GENEVE_DESTINATION_PORT; |
| v->udpcsum = false; |
| v->udp6zerocsumtx = false; |
| v->udp6zerocsumrx = false; |
| } |
| |
| const NetDevVTable geneve_vtable = { |
| .object_size = sizeof(Geneve), |
| .init = geneve_init, |
| .sections = NETDEV_COMMON_SECTIONS "GENEVE\0", |
| .create = netdev_geneve_create, |
| .create_type = NETDEV_CREATE_INDEPENDENT, |
| .config_verify = netdev_geneve_verify, |
| .generate_mac = true, |
| }; |
